{"id": 4448, "prediction_verbatim": "Bitcoin intraday volatility increases within 48h; realized vol rises above 30-day average", "created_at": "2026-05-04 16:45:44", "direction": "up", "timeframe": "48h", "score": null, "outcome": "Auto-expired \u2014 excluded from accuracy metrics", "resolved_at": "2026-05-06 17:10:47", "chain_hash": "79068e9ace774ca568cc95d5b497d72e22dc6eca1b0ec90ad400bf4b83f70292", "chain_tx": "e9Mjf2ddvntie9r7gco7gZfqyREnsu7GNgypZtCMpRbHaJR2Nt8vAZXASWFDARUooAFrW12kSN43vJAiKN6vJ9T", "verify": "sha256(f'{prediction_verbatim}|{created_at}|{id}') must equal chain_hash, and the Solana tx memo must read 'workshop:pred:<id>:<chain_hash>' with a timestamp BEFORE resolved_at. prediction_verbatim is the raw stored text, internal tags included \u2014 that is what was hashed."}